omg... where i can get that produc? they should be fine after? and does the fin root infect other fishe?

edit: i did some research on product "melafix" it says the following
* Heals open wounds and ulcers
* Rapidly restores damaged fins
* Stops mouth fungus
* Treats fin and tail rot
* Treats eye cloud
* Does not affect pH
* Safe for snails and other invertebrates in fresh and salt water
* Safe for live aquarium plants
* Will not harm the biological filter.

so it will only heal the fish but it doesn kill the bacterial in the tank?